Fan.



G. W. SMITH & J. GARY.

FAN.

APPLICATION FILED JUNE 15, 1910.

Patented Dec. 12, 1911.

lnventors Witnesses Attorneys GEORGE W. SMITH AND JOHN GARY, 0FCONEMAUGH, PENNSYLVANIA.

FAN.

Specification of Letters Patent.

' Patented Dec. 12, 1911.

Application filed June 15, 1910. Serial No. 567,078.

To all/whom it may concern:

Be it lmown' that we, GEORGE W. SMITH and JOHN GARY, citizens of theUnited States, residing at Conemaugh, in the county of Cambria, State ofPennsylvania, have invented a new and useful Fan, of which the followingis a specification.

The fan which is the subject of the present invention is designed moreparticularly for use in saw mills for removing dust, shavings, etc.; andit is the object of the invention to provide a fan of this kind whichwill not clog or choke up, nor become unbalanced. I

With this object in view, the invention consists in a novel constructionand arrangement of blades to be hereinafter described and'claimed,reference being bad to the accompanying drawing forming a part of thisspecification, in which drawing;

Figure 1 is a front elevation of the fan. Figs. 2 and 3 are sections onthe lines 22 and 3-3, respectively, of Fig. 1.

In the drawing, 5 denotes a circular disk suitably mounted on a shaft ofthe fan so as to rotate therewith, and serving as a sup port for theblades. The drawing omits the casing and shaft and shows the diskequipped with five blades, but their number is immaterial, and may bevaried at will to suit the size of the fan, or the particular conditionsunder which it is to be used.

Each blade of the fan is made from a segmental blank the straight edges6 and 7 of which are arranged at right angles to each other. The edgeportion 6 of each blank is secured to one face of the disk 5 by means ofrivets 9 or the like, the blade bemg curved rearwardly and laterallyawayfrom the edge 6 and thence forwardly in the direction of rotation ofthe disk and blades, thus giving a curved contour to the edge 7 andmaking the curved edge 8 of the blank the advancing edge of the bucketformed by the curved blade. This curved advancing ed e 8 of the blade isextended in'advance o the edge 6 and said curved edge 8 graduallyrecedes rearwardly and inwardly from the outer portion of the bucket andthen forwardly, in the direction of rotation of the bucket, to the fixedstraight edge 6. It will be noted that the blades are all spaced apartat their inner ends and, by curving the advancing edges 8 in the mannerset forth, the spaces between the inner or feed ends of the blades arecon siderably increased. It will be noted thatthe buckets are arrangedradially upon the== disks and are projected slightlybeyond the peripherythereof although this last anrangement is not deemed necessary.

The fan is adapted to rotate within a suitable casing not shown, thedirection of rotation being indicated by the arrow in Fig. 1. Sawdust orother material to be acted on by the fan is sucked into the fan casingand into the space between the inner ends of the blades or buckets. Thematerial is then thrown outwardly beyond the periphery of the disks bycentrifugal force and is discharged tangentially from the cas ing inwhich the fan is located. Should rags, ropes or the like beinadvertently fed to the fan, the advancing inner portions of the curvededges 8 will first engage them and, by reason of the contour of theseedges,

they will ride over or along the said materials and gradually directthem into the feed ends of the buckets without danger of them becominghung upon the blades because there are no angle portions presented tothe material and which are likely to be engaged thereby. As a result,clogging of the fan and its casing is prevented and any material fedinto the casing and to the space between the inner ends of the bladeswill be gathered up by the fan and ultimately discharged from the casingwithout injury either to the fan or to the casing. By arranging all ofthe blades or buckets upon one side of the disk and by extending theshaft from the other side of the disk and not through the disk asordinarily, a clear passage is provided between the disk and the inletof the casing and there is no shaft tending to obstruct the passageofmaterial.

The blades may be reinforced along their edges 8 by strips 10 of anysuitable material.

The inclosing casing of the fan has not been illustrated in the drawingas it forms no part of the present invention.

What is claimed is A fan including a disk, a shaft secured, at one end,to the center of one side of the disk, and a series of buckets disposedradially upon the other side of the disk and spaced apart at their innerends, each bucket being made up of a segmental blank having straightedges disposed at right angles to each other, one straight edge por tionof each blank being secured to the disk, and each of the blanks beingcurved rear- Wardly from said secured straight edge portion and thenceforwardly in the direction of rotation of the disk, the curved edge ofthe segmental blank constituting the curved advancing edge of the bucketand receding rearwardly from the outer toward the inner end of thebucket and thence forwardly to the secured straight edge of the bucket,the other straight edge portion of the blank following the curvature ofthe a bent blank, the inner portions of the curved advancing edges ofthe buckets constituting means for deflecting materials toward the 15GEO. W. SMITH. JOHN GARY.

Witnesses:

M. R. BRENNAN, WM. SHENnEMYER.

